linux-kernel - Re: [PATCH] Don't mlock guardpage if the stack is growing up

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Date:	Mon, 09 May 2011 23:12:53 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Tony Luck <tony.luck@...il.com>,
	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-parisc@...r.kernel.org,
	Michel Lespinasse <walken@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>, linux-ia64@...r.kernel.org
Subject: Re: [PATCH] Don't mlock guardpage if the stack is growing up

On Mon, 2011-05-09 at 16:25 -0700, Linus Torvalds wrote:
> On Mon, May 9, 2011 at 4:17 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > Ok, I'll consider it tested. I'll commit it with Mikulas as author,
> > but note that I edited it so he won't get the blame if there's some
> > problem.
> 
> Oh, and I marked it for stable too, although I don't know if any
> distribution really cares about parisc or ia64. And I'm not sure that
> ia64 even saw the lvm2 failure case - I'd have expected to hear about
> it if it actually happens there.

Well, it's a done deal, but here's the proof on parisc too:

Before:

c0266000-c0289000 rwxp 00000000 00:00 0                                  [stack]
c0266000-c0a66000 rwxp 00000000 00:00 0                                  [stack]

After:

bffee000-c0010000 rwxp 00000000 00:00 0                                  [stack]
bffee000-c0010000 rwxp 00000000 00:00 0                                  [stack]

James


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